Does regular blood transfusion prevent progression of cerebrovascular lesions in children with sickle cell disease?

Area of Science:

• Neurology
• Pediatrics
• Hematology

Background:

• Sickle cell disease (SCD) is a genetic blood disorder associated with a high risk of stroke in children.
• Cerebrovascular complications, including lesions and vasculopathy, are common in pediatric SCD.
• Chronic transfusion therapy is a primary strategy for stroke prevention in children with SCD.

Purpose of the Study:

• To evaluate the effectiveness of optimised chronic transfusion therapy in preventing the progression of cerebrovascular lesions in children with SCD.
• To assess changes in parenchymal and vascular abnormalities via MR imaging and angiography in pediatric SCD patients undergoing chronic transfusions.

Main Methods:

• A retrospective study analyzed MR imaging and angiography data from 18 children with SCD receiving chronic transfusions.
• Patients were divided into primary (n=9) and secondary (n=9) stroke prevention groups.
• An experienced neuroradiologist assessed lesion progression using standardized scores at baseline and follow-up.

Main Results:

• Cerebrovascular lesions showed progression in the secondary-prevention group (p = 0.027) despite optimised transfusion therapy.
• The study included a median of three MR scans per patient, with follow-up durations ranging from 7.9 to 127.9 months.
• Optimised transfusions did not halt the advancement of cerebral vasculopathy in children with a history of stroke.

Conclusions:

• Optimised chronic transfusion therapy is insufficient to prevent the progression of cerebral vasculopathy in children with sickle cell disease, particularly those with a prior stroke.
• Further research is needed to identify more effective interventions for managing cerebrovascular complications in pediatric SCD.
• These findings highlight the limitations of current transfusion protocols in completely mitigating stroke-related brain damage in this population.